The SKUs based on 18-core Haswell-EP die are already announced by intel.
http://qdms.intel.com/dm/d.aspx/BCA8C029-1771-4BE9-A192-6AF55BF1ABB5/PCN113043-01.pdf
E5-2699v3, 2698v3, 2697v3, 2695v3, 2683v3.
From some leaked threads: 2699v3 18-core; 2698v3 16-core; 2697v3, 2695v3, 2683v3...
The rumor from vrzone seems unreliable. It mentions that Haswell-EP has "three main die flavours 10-core, 14-core and 18-core".
According to recent docs from intel, the 3 flavours of Haswell-EP dies are 8, 12 and 18 core.
https://qdms.intel.com/cn/YDkAGpBRyUejMdjAP7TBTA==
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